在计算碳化深度时,计算精确至()MM。
A.0.1
B.0.5
C.1
参考答案:B
I ____________ the League for two years so far.
A.joined
B.have joined
C.join
D.have been in
※ [18~20] .( 3 )
A. .
B..
C. .
D..